Quite frequently during many different animé there will be a skip in the stream. Usually about 1 min. This will only happen once per animé. You'll only notice it due to the conversation breaking or scene changing. If you try rewinding to just prior to the skip it will skip again to the exact same point. So you will need to rewind to just after the initial skip. It doesn't matter what episode or what animé I'm watching.

Eg: 11.13 skips to 12.20. Rewind to 11.12 still skips to 12.20. Rewind to 11.14 and will not skip.